Furnace-arch construction.



P, ISLES. FURNACE ARGH CONSTRUCTION.

' 4 APPLICATION FILED JAILZE, 1910. Q $58,, 1 3% Patented May 17, 1910.

a sums-233m.

WITNESSES INVENTOR E f/ ti 5% 651M @ZL/Zw Pi ISLE-S. FURNACE ARCH CONSTRUCTION.

- I APPLICATION FILED 71117.25, 1910. m. 95 1 gg Patented May 11, 19M.

3 SHEETS-8133B? 2,

P REES. FURNACE ARCH CONSTRUCTION.

I, APPLICATION TILED JAH 25, 1910. bfiq 1 m Paisemed may 1'2, mat

- ISLES,

I FURNAGE-ABCH UQNSTLRL'UCTIOIQ'.

Specification of letters iaten'c.

Patented 31?, 3191 .0)

Application filed January 1510. Serial filo. 540,062.

Figure 1 is a plan View, partly in section,

cl? one end of e regenerative furnace having sport arch constructed and arranged in accordence with my invention. Fig. 2 1s a sectional side elevation of the same, on the line H-l l oi Fig. 1. Fig. 3 is a sectional end. View on the line III-Ill of Fig. 2, showing in elevation the gas and air ports and the port construction forming my invention.

This invention relates to improvements in furnace arches and more particularly to the port arch and the end Well construction of regenerative heating or melting furnaces,

The Ob ect of the inventlon is to provide aconstruction which will Withstand the intense heat of a regenerative furnace for a longer period of time than has heretofore been possible, and a construction in which the making of repairs to the end Witll con stl uction is facilitated, the life of the end. Well is lengthened and the liability of delays in the operation of the fences caused by caving in of the arches is largely overcome.

In the drawings, 2 represents the hearth of an open hearth furnace which is connected through the -port opening 3 with the regenerator lines 4. The furnace shown is arranged to use netuel gas which it is not necessary to regenerate end the therefore, is led into the furnace through opening; 5 in the opposite side Walls of the furnace, although my invention is not limited. to such use but can be used with furnoses using producer The furnace is .ovided with the usual surrounding n1 framework or shell, which, ,not forming; part of iny'invention, need not he further described, other than that it is one of ercl well-known constructions of such surrounding" framework employed with such furnaces.

Another object of the invention to pro vide a novel end Well construct-ion through. whi h the and air ports extend into the furnace, in use er which damage to the end ell caused by intens heat and by splashing of the loath in the furnace, is reduced to a minimum and the life hi the end Well of the furnace and of the furnace lining is very largely increased.

As is shown in Figs. 1, 2 and 3, the roof of the furnace is arched transversely and also curves downwardly from the center of its length toward its ends, the arched roof over the port 3 being at the lowest point of the furnace roof. The roof over the re generator fines l is also arched and is inclined downwardly and inwardly toward the furnace.

Instead of keeping the roof 6 oi? the regeneroter iiues entirely independent of the furnace roof, as has heen done heretofore, this roof is built into and its end. thrust resisted by the brick WOllI in the roof or covering 7 over the inlet ports 3. The longitudinal thrust of the roof 8 over the furnace proper in the opposite direction is also re sisted by the brick Work of the rooi 7, the thrust of the flue roof 6 largely balancing that of the furnace roof 7. It will he noted that the joints between the brick Work in the roof Y and also in the roof 8 extend 1761* ticallyfl The furnace roof 8 is arched trensveesely the thrust of the arched. rooif is telren by the skew-backs 9 through which thrust is transmitted to the nietel shell of the furnace, this construction being elosrly shown in Hcretofore in the construction of the end Walls of furnaces which divide rcgenerstor fines from the furnace chamber end thrmigh which wall the gas and air inlet ports tend, the arch or roof over the ports he. been built so as to spring from a shew-hack located at the end of the sch, the vertice' face of the skew-hack forming the end s face of the port openings. In the operation of such furnaces, the intense heat ilh open hearth furnaces the s, limd bath on the cudwill (lPJll'lllC to the wills, L: walls between the. i and. the section oi the side WitllS with the end of the turns in which he etch When the hrn work in w; destroyed in this manner, the thrust 111 ill, arch tends to destroy the arch and caving in 01 these arches icntly necessitates the shutting down of the furnace "for repcirs.

In my improved construction, the thrust of the arch is extended or carried to point Without the arch necessarily being greatly weakened, and, it not being necessary he resisl; she thrust of the arch as heretofore, this arch and end. Well can be easily andv quickly repaired by applying new plastic refractory material. which is dried in place thereon "to die worn or burned-sway portions of the end Wall.

is will. be seen by reference "to 2 end that she jo...ils between the bricks in the port, arch extend radially the joints sch the sides of the furnace, extend 3. ivy, .e rsliel joints in the end Wald radiating from the censor from which the curve of the arch is struck for an increasingly greater distance downwardly and cut-- wul'dly into the end Wall of the furnace, this construction also facilitating the male ing of repairs and increasing the life of the such and. end Well.

in the o erection of the furnaces, the air enters the n'nsce from the flues 4e through lll16 port 3 and the gas is introduced through the openings in the side Walls at the end of the furnace, shown dotted in Fig. 2. The partition. 3 in the middle of the length of she poz l'opei "deflects the incoming gas and directs il '[lirough the port opening 3 Where it 18 mixed with the incoming heated sits and burns. The products of combustion cs? binned. pass out through a similar pol-l, opening" 3 and fines 4- on the opposirc end of the furnace, the gases being caused to puss al 'ei'ne 'zely in opposite directions across the lenglli of the furnace fZOn] opposite ends of the nrimce in the usual manner.

lllodificetions in the construction and arrangement. of the parts may be made With- Qui; departing from my invent-ion.

I clsim:

1. In s regenerative furnace, s. furnace end wall having inlet and outlet ports therein connecfiing the furnace and he regeneintors, and an arched roof over said ports, the mdiel oints 1!). said arch radiating from the cents of the arch and extending; lo the side walls of the furnace; substantially described.

2. In a regenerative furnace, a furnace end wall having inlet and outlet pen-ts therein connecting the furnace and the furnace fines, and an arched Well over said ports, the redial joints in said arch radiating and extending beyond and below the curved roof surface defining the top of the inlet port opening; subsfientislly as described.

3. In a regenerative furnace, a furnace end wall having inlet ports thereto, an arched roof over said inlet ports, the radial joints in said arch rsdieiing from the center of the arch and amendingbeyond the inner surface of the side Walls of said furnace and ex tending below the spring of the urea, s downwardly and in zvcrdly inclined arched roof over the furnace flues engaging Willi ssid port roof and a downwardly and one weirdly inclined furnace roof engaging With the opposite side of said port roof; substantially. as described.

4.. In a regenerative furnace, a furnace end Wall having inlet ports thereto, an arched roof over said inlet ports, the radial joints in said such extending at lea t to the inner surface of the side Walls of said furnace and. extending" below the spring of the arch and radiating from the center of the spring of the arch, a downwardly cud inwardly inclined arched roof over the furnace fines engaging with said port roof and e dcWnwsrdly and outwardly inclined furnace rcoit' engagin with the opposite side of said port roof; su stuntislly as described.

5. In a. regenerative furnace, a. furnace end Well lisving'inlet ports thereto, on arched roof over said inlet ports, said arch extendlug: beyond the inner surface of the side walls of said furnace, the joints in said end Well extending radially from the center of the spring of said arch; substantially as described.

in testimony whereof, I have hereunto set my hand.

PETER ISLE Witnesses:

' R. H. STEVENS, R. F. Gunmen. 

